Test1-2010-solutions

Test1-2010-solutions - Name: _ Student Number: _ CHEMISTRY...

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Name: ________________________ Student Number: _______________ Version 1 Page 1 CHEMISTRY 1E03 15 OCTOBER 2010 Instructor: J. Barbier Answers for Version 1 MCMASTER UNIVERSITY - TERM TEST # 1 - DURATION: 100 minutes This test contains 16 pages and 25 multiple-choice questions . The last pages include extra blank pages for rough work, a page with some useful data and equations, and a Periodic Table. You may tear off the last five pages. You are responsible for ensuring that your copy of the question paper is complete . Bring any discrepancy to the attention of your invigilator. Questions 1-20 are each worth 2 marks, questions 21–25 are each worth 3 marks. There is no penalty for incorrect answers. Answer all questions on the answer sheet, in pencil . Instructions for entering multiple-choice answers are given on page 2. Select one answer only for each question. These question sheets must be returned with your answer sheet. However, no work written on the question sheets will be marked . You must enter your full name and student number on this question sheet, as well as on the answer sheet. Your invigilator will be checking your student card for identification. Make sure to enter the correct version number of your test (shown at the bottom of each page) in the correct column on the answer sheet (see instructions on page 2). Only Casio FX 991 electronic calculators may be used; but they must NOT be transferred between students. Use of periodic tables or any aids other than those provided, is not allowed. Note: Academic dishonesty may include, among other actions, communication of
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Name: ________________________ Student Number: _______________ Version 1 Page 2 QUESTIONS 1–20 ARE WORTH 2 MARKS EACH. 1. The anion 33 S contains A) 33 neutrons, 17 protons, 18 electrons B) 33 neutrons, 16 protons, 17 electrons C) 17 neutrons, 16 protons, 17 electrons 2 marks D) 16 neutrons, 17 protons, 16 electrons E) 16 neutrons, 17 protons, 18 electrons 2. The percentage by mass of bicarbonate in an Alka-Seltzer tablet is 25.5 %. Calculate the volume of carbon dioxide gas (in mL) generated at 37 °C and 1.00 atm from a 3.29 g tablet according to the reaction: HCO 3 (aq) + H + (aq) H 2 O(l) + CO 2 (g) A) 1.37 10 3 0.5 m B) 0.350 1 m C) 53 D) 618 E) 350 2 m A 3.29 g tablet contains 3.29 0.255 = 0.839 g bicarbonate Molar mass of bicarbonate (HCO 3 - ) = 12.01 + 1.008 + 48.00 = 61.018 g # moles bicarbonate = 0.839 / 61.018 = 1.375 10 –2 mole # moles of CO 2 produced = 1.375 10 –2 mole (see reaction above) PV = nRT V = 1.375 10 –2 0.08206 310.15 / 1.00 = 0.350 L = 350 mL 3. How many
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This note was uploaded on 11/08/2011 for the course ECON 1B03 taught by Professor Hannahholmes during the Fall '08 term at McMaster University.

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Test1-2010-solutions - Name: _ Student Number: _ CHEMISTRY...

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